The DFL-300 Office Firewall provides an economical solution for providing small offices with dependable firewall protection against malicious attacks from hackers on the Internet. The DFL-300 provides a web-based interface for easy setup and configuration but is also designed with more advanced security features than typically found in residential gateways. The DFL-300 defends networks against damaging Denial of Service (DoS) attacks and offers network reliability through Stateful Packet Inspection (SPI). It can detect hacker attacks and disallow intruding packets from entering the office network.